Matthijs van Duin <[EMAIL PROTECTED]> writes:
> On Sat, Mar 22, 2003 at 10:24:09PM +0200, arcadi shehter wrote:
>> sub a {
>> state $x;
>> my $y;
>> my sub b { state $z ; return $x++ + $y++ + $z++ ; }
>> return &b; # is a \ before &b needed?
>> }
>>
>>
>>will all &b refer to the same $z ?
>
> yes, they will
Are you sure about that. If state is declaring a lexically scoped
alias to a property of the block/sub, then each invocation of a will
generate a different block/sub &b, which implies that the various &b
instances won't share the same $z property.
>> does it mean that this is legitimate sub a {
>> state $x;
>> my $y;
>> state sub b { state $z ; return $x++ + $y++ + $z++ ; }
>> return &b; # is a \ before &b needed?
>> }
>
> No, since you can't refer to $y in that sub (perl 5 actually allows
> you to do that but gives a warning 'Variable "%s" will not stay
> shared' - but I hope perl 6 will simply give a compile-time error)
Personally I would hope that it would correctly close over
$y. Especially if, as you claim, $z would be shared by all values of
&b. Otherwise there's no way to get that particular behaviour.
--
Piers
